Malicious PDF — malware analysis report

Static analysis result for SHA-256 477474fc84c80ab8…

MALICIOUS

PDF

69.9 KB Created: 2021-03-11 20:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3b85cffd56b0f6782f0fa4142344cdfa SHA-1: 44a2d850d25219928acf4567ea5ed028c683a31e SHA-256: 477474fc84c80ab8356dc95878f7b04f46bca85f42ce2d3fe8a68e5ab58ed03a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The presence of these URLs and the PDF's structure suggest it's used in a phishing or scam campaign, likely attempting to trick users into visiting compromised or malicious web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/award?keyword=why+nand+and+nor+gates+are+called+universal+gates+pdf PDF link annotation
    • http://deutschebank-meine.com/tuberculosis_chest_x_ray_reportshdyb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fe4392a964de.pdfIn PDF document text
    • http://ubsvp.com/peter_pan_book1uel6.pdfIn PDF document text
    • http://br1.red/3745349588ic46k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_6023afc2391a3.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/ghhhgCJ/likee_app_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/fkSiQpB/mubenavexex.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/ibSPSxm/joplin_mo_zip_code_map.pdfIn PDF document text
    • http://everydayy.fun/romijuraxevibepit98fz8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_602bb0c33e8ed.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/HjdhgkO/sprout_social_social_media_strategy.pdfIn PDF document text
    • http://copyrightshelpscenters.com/gandii_baat_season_2_anveshi_jaing5ag8.pdfIn PDF document text
    • https://cdn.sqhk.co/medugagoviji/dPJSSji/red_balloon_toy_shop_west_kirby.pdfIn PDF document text
    • http://kexisugotiro.22web.org/34571765990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novexivijifo.rf.gd/how_many_trays_can_i_add_to_nesco_dehydrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfaef4a-cf2f-4647-ac44-975ec7922476/1093301506.pdfIn PDF document text
    • http://bedipate.epizy.com/ajcc_breast_cancer_staging_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4546599d-6fd8-4516-b38f-ed66bd38b736/line_6_pocket_pod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e9e39b-9bf0-4923-922c-91117d7fa7eb/how_much_money_do_movie_directors_make_per_movie.pdfIn PDF document text
    • http://zifosasexinedi.rf.gd/27499293564.pdfIn PDF document text
    • http://sujutesar.rf.gd/castiel_s_true_form_description.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 5592 bytes
SHA-256: 82c8406c381ce7653a14cb89e3e89cf3032d0b58ad818cd7347466e0be68e771
font_01_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 9916 bytes
SHA-256: c99c1cffbe3d18ec1bf7d8295a350a48e4e203e25b346ba0b5c79ef8892bb441

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